Chapter 1 Knowing Our Numbers Ex 1.2 Solutions
Question - 1 : - A book exhibition was held for four days in a school. The number of tickets sold at the counter on the first, second, third, and final day was respectively 1094, 1812, 2050, and 2751. Find the total number of tickets sold on all the four days.
Answer - 1 : -
Tickets sold on 1st day = 1094
Tickets sold on 2nd day = 1812
Tickets sold on 3rd day = 2050
Tickets sold on 4th day = 2751
Total tickets sold = 1094 + 1812 + 2050 + 2751
∴ Total tickets sold = 7,707
Question - 2 : - Shekhar is a famous cricket player. He has so far scored 6980 runs in test matches. He wishes to complete 10, 000 runs. How many more runs does he need?
Answer - 2 : -
Runs scored so far = 6980
Runs Shekhar wants to score = 10,000
More runs required = 10,000 − 6980
∴ Shekhar requires 3,020 more runs.
Question - 3 : - In an election, the successful candidate registered 5, 77, 500 votes and his nearest rival secured 3, 48, 700 votes. By what margin did the successful candidate win the election?
Answer - 3 : -
Votes secured by successful candidate = 5,77,500
Votes secured by rival = 3,48,700
Margin = 5,77,500 − 3,48,700
∴ Margin = 2,28,800
Question - 4 : - Kirti bookstore sold books worth Rs 2,85,891 in the first week of June and books worth Rs 4,00,768 in the second week of the month. How much was the sale for the two weeks together? In which week was the sale greater and by how much?
Answer - 4 : -
Value of Books sold in 1st week = Rs 2,85,891
Valueof books sold in 2nd week = Rs4,00,768
Totalsale = Sale in 1st week + Salein 2nd week
=2,85,891 + 4,00,768The sale for the two weekstogether was 6,86,659.
Since4,00,768 > 2,85,891, sale in 2nd weekwas greater than 1st week.
∴ The sale in 2nd weekwas larger than the sale in 1st weekby Rs 1,14,877.
Find the difference between the greatest and the least number that can be written using the digits 6, 2, 7, 4, 3 each only once.
Answer - 5 : -
Greatest number = 76432
Smallest number= 23467
Difference= 76432 − 23467
Therefore, the differencebetween the greatest and the least number that can be written using the digits6, 2, 7, 4, 3 each only once is 52,965.
Question - 6 : - A machine, on an average, manufactures 2,825 screws a day. How many screws did it produce in the month of January 2006?
Answer - 6 : -
Screws produced in one day= 2,825
Days inJanuary = 31
Screwsproduced in 31 days = 2825 × 31
Therefore, screws producedduring Jan, 06 = 87,575
Question - 7 : - The distance between the school and the house of a student’s house is 1 km 875 m. Everyday she walks both ways. Find the total distance covered by her in six days.
Answer - 7 : -
Distance between schooland house = 1 km 875 m
Now, 1 km= 1000 m
1 km 875m = 1875 m
Distancecovered each day = 1875 × 2 = 3750 m
Distancecovered in 6 days = 3750 × 6
Therefore, distancecovered in 6 days = 22,500 m
= 22.5 kmor 22 km 500 m
Question - 8 : - A vessel has 4 litres and 500 ml of curd. In how many glasses, each of 25 ml capacity, can it be filled?
Answer - 8 : -
Capacity of vessel = 4 l 500 ml
= 4500 ml (1 l = 1000 ml)
Capacity of a glass = 25 ml
Number of glasses that can be filled = 4500 ÷ 25
∴ 180 glasses can be filled.